Koyoe KY-EST06KH, User Manual

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1. System Introduction
KY-EST06KH/ KY-EST08KH/ KY-EST10KH/KY-EST12KH/ KY-EST15KH/ KY-EST17KH/ KY-
EST20KH series inverter, also known as hybrid or bidirectional solar inverter, is suitable for
energy management of photovoltaic, battery, load, power grid and other solar energy systems.
Electricity from the photovoltaic panels is used for residential electricity, and excess power can be
stored in batteries. When the battery is fully charged, users can send excess power to the utility
grid.
When the photovoltaic power is not enough to meet the user's load demand, the battery will
discharge to the load. If there is not enough energy stored in the battery, the grid will supply
power to the load through the system.
The inverter with no transformer topology, and there is no isolation between DC input and AC
output. The adaptive PV model must meet IEC61730 Class A. The energy management system is
shown in Figure 1-1.
Fig.1-1 PV Energy Storage System
Item
Description Remark
A PV strings Photovoltaic panel
B Inverter
Model
：
KY-EST20KH
C Energy meter(three-phase) RS 485 communication with inverter
D Utility grid Grid grouding system types: TT,TN
E Battery System A Li-ion battery or a lead-acid battery.
F UPS load User load connected to the inverter EPS port.
G Grid load User loads connected to the grid.
Warning!
-For the TT utility grid, the N line voltage to ground must be 30V
or less.
-
The maximum power of home load and EPS load
must be less than the rated power of inverter.